I fractured my tibia in Jan 2015 and took a long time to heal. My injury was treated with a succession of casts though and I had no metal work. I got very down and wondered if I would ever heal. After five months, in June, I was sent for a CT scan instead of the usual X ray. This revealed more detail and showed that I was in fact healing. At the end of July the last cast came off and I graduated into an aircast boot for the following 3 months. I finally came out of all leg support at the end of October. So there is light at the end of the tunnel. I do hope you are making progress but can empathise with your frustration and despair.